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Unit 3: Evolution

TermDefinition
adaptation trait that allows survival in a specific environment
biodiversity variety of species living in one area
cladogram diagram that shows evolutionary relationships throughout time; shows relatedness of species; the closer the branch splits, the more closely related, share common ancestor
common ancestor
competition
dichotomous key uses pairs of statements to narrow down characteristics/identify something; Rules: statements can only have 2 possible answers, observable traits, measurable sizes)
embryology many early vertebrate embryos look similar
environment
evolution change in an entire species over a very long period of time
extinction
fossil
genetic relatedness
homologous structures similar body structures shared between very different species (Ex: forearm bones of human, cat, whale, bat)
molecular evidence comparing species using DNA sequences
natural selection/survival of the fittest the environment determines which organisms survive to pass on genes and reproduce
species/population a group of organisms who can mate together and create fertile offspring
structural evidence comparing species based on body structures/phenotypes/physical traits (Ex: bones, wings, tails)
theory
vestigal structure structures that have no current function , but support evolutionary relationships
artificial selection/selective breeding humans choose which organisms mate, based on desired traits
Created by: user-1592520
 

 



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